/*%
* Creates a #lwres_context_t structure for use in
* lightweight resolver operations.
*/
lwres_result_t
lwres_context_create(lwres_context_t **contextp, void *arg,
lwres_malloc_t malloc_function,
lwres_free_t free_function,
unsigned int flags)
{
lwres_context_t *ctx;
REQUIRE(contextp != NULL && *contextp == NULL);
/*
* If we were not given anything special to use, use our own
* functions. These are just wrappers around malloc() and free().
*/
if (malloc_function == NULL || free_function == NULL) {
REQUIRE(malloc_function == NULL);
REQUIRE(free_function == NULL);
malloc_function = lwres_malloc;
free_function = lwres_free;
}
ctx = malloc_function(arg, sizeof(lwres_context_t));
if (ctx == NULL)
return (LWRES_R_NOMEMORY);
/*
* Set up the context.
*/
ctx->malloc = malloc_function;
ctx->free = free_function;
ctx->arg = arg;
ctx->sock = -1;
ctx->timeout = LWRES_DEFAULT_TIMEOUT;
#ifndef WIN32
ctx->serial = time(NULL); /* XXXMLG or BEW */
#else
ctx->serial = _time32(NULL);
#endif
ctx->use_ipv4 = 1;
ctx->use_ipv6 = 1;
if ((flags & (LWRES_CONTEXT_USEIPV4 | LWRES_CONTEXT_USEIPV6)) ==
LWRES_CONTEXT_USEIPV6) {
ctx->use_ipv4 = 0;
}
if ((flags & (LWRES_CONTEXT_USEIPV4 | LWRES_CONTEXT_USEIPV6)) ==
LWRES_CONTEXT_USEIPV4) {
ctx->use_ipv6 = 0;
}
/*
* Init resolv.conf bits.
*/
lwres_conf_init(ctx);
*contextp = ctx;
return (LWRES_R_SUCCESS);
}
int
main(int argc, char *argv[]) {
lwres_context_t *ctx;
const char *file = "/etc/resolv.conf";
int ret;
#ifdef USE_ISC_MEM
isc_mem_t *mem;
isc_result_t result;
#endif
isc__mem_register();
isc__task_register();
isc__timer_register();
isc__socket_register();
if (argc > 1) {
file = argv[1];
}
#ifdef USE_ISC_MEM
mem = NULL;
result = isc_mem_create(0, 0, &mem);
INSIST(result == ISC_R_SUCCESS);
#endif
ctx = NULL;
#ifdef USE_ISC_MEM
ret = lwres_context_create(&ctx, mem, mem_alloc, mem_free, 0);
#else
ret = lwres_context_create(&ctx, NULL, NULL, NULL, 0);
#endif
CHECK(ret, "lwres_context_create");
lwres_conf_init(ctx);
if (lwres_conf_parse(ctx, file) == 0) {
lwres_conf_print(ctx, stderr);
} else {
perror("lwres_conf_parse");
}
lwres_conf_clear(ctx);
lwres_context_destroy(&ctx);
#ifdef USE_ISC_MEM
isc_mem_stats(mem, stdout);
isc_mem_destroy(&mem);
#endif
return (0);
}
